Green Party candidate for Brighton Pavilion Caroline Lucas gives an address at the launch of the party's general election manifesto in London on April 14, 2015. Britain goes to the polls on May 7 to elect a new parliament. AFP PHOTO / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)

Britain's sole Green MP has attacked The Daily Telegraph for publishing a "highly offensive" headline and picture on a blog post she wrote for the paper.

Caroline Lucas hit out at the publication's editors, who complemented her piece encouraging compulsory personal, social, health and economic (PSHE) lessons for schoolchildren to protect them against sexual abuse, with a picture of pupils from the film 'St Trinians' and a title reading: "Britain's 'slutty slaggy' schoolgirls need David Cameron to sort sex education. Fast"

The original article claimed that such classes would teach kids how to resist and deal with sexual abuse, particularly potent in the wake of scandals involving celebrities and politicians.

Despite the paper back-peddling to avoid a social media frenzy, first adjusting the offending headline then changing its accompanying photo, Lucas and many of her supporters decried the original slip-up as "appalling", "misleading" and "sexist".

Lucas tweeted about the incident herself on Wednesday, saying: "A great shame that the Telegraph gave this dreadful headline to my piece about the PSHE Bill. Highly offensive."